The Pear company sells pPhones. The cost to manufacture x\displaystyle {x} pPhones is C(x)=−25x2+54000x+19515\displaystyle {C}{\left({x}\right)}=-{25}{x}^{{2}}+{54000}{x}+{19515} dollars (this includes overhead costs and production costs for each pPhone). If the company sells x\displaystyle {x} pPhones for the maximum price they can fetch, the revenue function will be R(x)=−30x2+154000x\displaystyle {R}{\left({x}\right)}=-{30}{x}^{{2}}+{154000}{x} dollars.

How many pPhones should the Pear company produce and sell to maximimze profit? (Remember that profit=revenue-cost.)

x=  

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